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多Λ超核基态性质的研究

Properties of Multi-Lambda Hypernuclei
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摘要 依据多Λ超核在高能重离子碰撞或天体物理中实现的可能性,以Ca为例,用相对论连续谱Hartree-Bogoliubov理论研究了系统的基态性质,包括每重子结合能、重子均方根半径和超核物质半径以及单粒子能谱等。研究表明,随着超子数目的增加,超核的每重子结合能和超子均方根半径变化趋势平缓,在5100ΛCa等一些超核内超子2s1/2和1d5/2能级排列有明显的反转,丰质子区和总核子数不变的多Λ钙超核滴线所对应的最大超子数分别为6和22。 Properties of multi-Lambda Ca hypernuclei are studied in the relativistic continuum Hartree-Bogoliubov theory.The binding energy per baryon and the hyperon radius are found to change smoothly with the increasing of hyperon number.An obviously reversed arrangement of hyperonic states 2s1/2 and 1d5/2 are found,e.g.,in 5010ΛCa.The predicted drip-line hypernuclei from proton-rich side and constant nucleon number side are respectively 406ΛCa and 6622ΛCa.
出处 《北京大学学报(自然科学版)》 EI CAS CSCD 北大核心 2009年第5期753-758,共6页 Acta Scientiarum Naturalium Universitatis Pekinensis
基金 国家自然科学基金(10505002) 中国农业大学科研启动基金(2007005)资助
关键词 相对论连续谱Hartree-Bogoliubov理论 多Λ超核 滴线超核 relativistic continuum Hartree-Bogoliubov theory multi-Lambda hypernuclei dripline hypernuclei
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